package com.student.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.student.service.GoodsService;
import com.student.service.RecommendService;
import com.student.util.JsonTools;

public class GoodsServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public GoodsServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");

		PrintWriter out = response.getWriter();

		String flag = request.getParameter("action_flag");
		String json = "";
		try {
			if ("get_all_goods".equals(flag)) {
				json = JsonTools.createJsonString(GoodsService.getAllGoods());
			} else if ("get_hot_goods".equals(flag)) {
				json = JsonTools.createJsonString(GoodsService.getHotGoods());
			} else if ("get_seller_goods".equals(flag)) {
				String sellerId = request.getParameter("sellerId");
				json = JsonTools.createJsonString(GoodsService
						.getSellerGoodsEntity(sellerId));
				// 随机获得商品
			} else if ("get_rand_goods".equals(flag)) {
				json = JsonTools.createJsonString(GoodsService.getRandGoods());
				// 获得最新商品
			} else if ("get_recent_goods".equals(flag)) {
				json = JsonTools.createJsonString(GoodsService.getRandGoods());
				// OEM++ liwt@2013-04-05
				// 获得推荐的商品
			} else if ("get_recommand_goods".equals(flag)) {
				String userName = request.getParameter("userName");
				json = JsonTools.createJsonString(RecommendService
						.getRecommendGoods(userName));
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		out.print(json);
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
